From 85e966963e7e48b12666ae46f426fd2d1ed886eb Mon Sep 17 00:00:00 2001
From: Thibault Saunier <tsaunier@igalia.com>
Date: Wed, 1 May 2019 18:20:42 -0400
Subject: [PATCH] project: Add a signal to notify when a new timeline is
 starting to load

---
 ges/ges-project.c | 19 +++++++++++++++++--
 ges/ges-project.h |  4 +++-
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/ges/ges-project.c b/ges/ges-project.c
index 5f5baab70c..b65a1a0993 100644
--- a/ges/ges-project.c
+++ b/ges/ges-project.c
@@ -80,6 +80,7 @@ typedef struct EmitLoadedInIdle
 
 enum
 {
+  LOADING_SIGNAL,
   LOADED_SIGNAL,
   ERROR_LOADING_ASSET,
   ASSET_ADDED_SIGNAL,
@@ -179,6 +180,7 @@ _load_project (GESProject * project, GESTimeline * timeline, GError ** error)
 
   priv = GES_PROJECT (project)->priv;
 
+  g_signal_emit (project, _signals[LOADING_SIGNAL], 0, timeline);
   if (priv->uri == NULL) {
     EmitLoadedInIdle *data = g_slice_new (EmitLoadedInIdle);
 
@@ -481,10 +483,23 @@ ges_project_class_init (GESProjectClass * klass)
       G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GESProjectClass, asset_removed),
       NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_ASSET);
 
+  /**
+   * GESProject::loading:
+   * @project: the #GESProject that is starting to load a timeline
+   * @timeline: The #GESTimeline that started loading
+   *
+   * Since: 1.18
+   */
+  _signals[LOADING_SIGNAL] =
+      g_signal_new ("loading", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESProjectClass, loading),
+      NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE,
+      1, GES_TYPE_TIMELINE);
+
   /**
    * GESProject::loaded:
-   * @project: the #GESProject that is done loading a project.
-   * @timeline: The #GESTimeline that complete loading
+   * @project: the #GESProject that is done loading a timeline.
+   * @timeline: The #GESTimeline that completed loading
    */
   _signals[LOADED_SIGNAL] =
       g_signal_new ("loaded", G_TYPE_FROM_CLASS (klass),
diff --git a/ges/ges-project.h b/ges/ges-project.h
index 18239844d2..a9648350cd 100644
--- a/ges/ges-project.h
+++ b/ges/ges-project.h
@@ -71,8 +71,10 @@ struct _GESProjectClass
                               GType extractable_type);
   gboolean (*loaded)         (GESProject  * self,
                               GESTimeline * timeline);
+  gboolean (*loading)        (GESProject  * self,
+                              GESTimeline * timeline);
 
-  gpointer _ges_reserved[GES_PADDING];
+  gpointer _ges_reserved[GES_PADDING - 1];
 };
 
 GES_API